sole
n.
1
"bottom of the foot" ("technically, the planta, corresponding to the palm of the hand," Century Dictionary), early 14c., from Old French sole, from Vulgar Latin *sola, from Latin solea "sandal, bottom of a shoe; a flatfish," from solum "bottom, ground, foundation, lowest point of a thing" (hence "sole of the foot"), of uncertain origin. In English, the meaning "bottom of a shoe or boot" is from late 14c.
2
common European flatfish, mid-13c., from Old French sole, from Latin solea "a kind of flatfish," originally "sandal" (see sole, n.1); so called from resemblance of the fish to a flat shoe.
adj.
"single, alone, having no husband or wife; one and only, singular, unique," late 14c., from Old French soul "only, alone, just," from Latin solus "alone, only, single, sole; forsaken; extraordinary," of unknown origin, perhaps related to se "oneself," from PIE reflexive root *swo- (see so).
v.
"furnish (a shoe) with a sole," 1560s, from sole, n.1. Related: Soled; soling.
〔李〕[sol;-e] a.单独的； 独身的 ←sol (L solus)=alone 单独的
〔蒋〕单独的，唯一的